big changes here:

- Eliminate the useless check for cpu modifications option from efb to ram as it must be enabled always
- use constant names in dx11 for buffer length calculation instead to simplify code reading
- implemented scaled efb copy in opengl, still bugy in some games, the option is not in the gui but will add it when it works perfect
- Change the depth calculation behavior:
if the game use z textures is exactly the same as before.
if the game do not use z texture calculate z values in the vertex shader. the advantage id this approach is that early z culling is applied,
improving fill rate. this mus speed up things, even with ssaa and msaa enabled.
please test for regression and enjoy.

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@5896 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Plugins/Plugin_VideoDX9/Src/VertexShaderCache.cpp

@@ -37,7 +37,7 @@
 VertexShaderCache::VSCache VertexShaderCache::vshaders;
 const VertexShaderCache::VSCacheEntry *VertexShaderCache::last_entry;
 
-static float GC_ALIGNED16(lastVSconstants[C_FOGPARAMS + 8][4]);
+static float GC_ALIGNED16(lastVSconstants[C_VENVCONST_END][4]);
 #define MAX_SSAA_SHADERS 3
 
 static LPDIRECT3DVERTEXSHADER9 SimpleVertexShader[MAX_SSAA_SHADERS];
@@ -218,7 +218,7 @@ void VertexShaderCache::Clear()
 		iter->second.Destroy();
 	vshaders.clear();
 
-	for (int i = 0; i < (C_FOGPARAMS + 8) * 4; i++)
+	for (int i = 0; i < (C_VENVCONST_END * 4); i++)
 		lastVSconstants[i / 4][i % 4] = -100000000.0f;
 	memset(&last_vertex_shader_uid, 0xFF, sizeof(last_vertex_shader_uid));
 }